722589120 has 224 divisors, whose sum is σ = 2781239040. Its totient is φ = 175150080.

The previous prime is 722589073. The next prime is 722589149. The reversal of 722589120 is 21985227.

722589120 is a `hidden beast` number, since 72 + 2 + 589 + 1 + 2 + 0 = 666.

722589120 is a nontrivial binomial coefficient, being equal to C(38016, 2).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91239 + ... + 98841.

Almost surely, 2^722589120 is an apocalyptic number.

722589120 is the 38015-th triangular number and also the 19008-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722589120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390619520).

722589120 is an abundant number, since it is smaller than the sum of its proper divisors (2058649920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722589120 is a wasteful number, since it uses less digits than its factorization.

722589120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640 (or 7624 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 722589120 is about 26881.0178378721. The cubic root of 722589120 is about 897.3540061978.

The spelling of 722589120 in words is "seven hundred twenty-two million, five hundred eighty-nine thousand, one hundred twenty".